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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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sockaddr_in(3type) sockaddr_in(3type)
sockaddr_in, in_addr, in_addr_t, in_port_t - IPv4 socket address
Standard C library (libc)
#include <netinet/in.h>
struct sockaddr_in {
sa_family_t sin_family; /* AF_INET */
in_port_t sin_port; /* Port number */
struct in_addr sin_addr; /* IPv4 address */
};
struct in_addr {
in_addr_t s_addr;
};
typedef uint32_t in_addr_t;
typedef uint16_t in_port_t;
sockaddr_in
Describes an IPv4 Internet domain socket address.
.sin_port and .sin_addr are stored in network byte order.
POSIX.1-2024.
POSIX.1-2001.
sockaddr(3type), sockaddr_in6(3type)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.18.tar.gz
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⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2026-05-24. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.18 2025-11-25 sockaddr_in(3type)
Pages that refer to this page: sockaddr(3type), sockaddr_in6(3type), ip(7)
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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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